US3874245A - Drive apparatus for rotary spindles - Google Patents

Drive apparatus for rotary spindles Download PDF

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Publication number
US3874245A
US3874245A US439704A US43970474A US3874245A US 3874245 A US3874245 A US 3874245A US 439704 A US439704 A US 439704A US 43970474 A US43970474 A US 43970474A US 3874245 A US3874245 A US 3874245A
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US
United States
Prior art keywords
feed nut
screw
pull
rail
rods
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US439704A
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English (en)
Inventor
Jan Kral
Kurt Kerlin
Heldemar Gratza
Alfons Harazim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MORAVSKOSLEZSKA ARMATURKA NARODNI PODNIK
Original Assignee
MORAVSKOSLEZSKA ARMATURKA NARODNI PODNIK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application granted granted Critical
Publication of US3874245A publication Critical patent/US3874245A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • F16K31/502—Mechanical actuating means with screw-spindle or internally threaded actuating means actuating pivotable valve members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18576—Reciprocating or oscillating to or from alternating rotary including screw and nut
    • Y10T74/18656—Carriage surrounded, guided, and primarily supported by member other than screw [e.g., linear guide, etc.]

Definitions

  • Low friction slide plates are removably provided on the feed nut.
  • drive apparatus for controlling the operation of a rotary valve spindle comprising a body in which an elongated screw is rotatably mounted.
  • a feed nut is located on the screw and lever means are provided adapted to connect the feed nut and the spindle of the rotary valve so as to transfer the axial movement of the feed nut along the screw into rotary movement of the spindle.
  • Means are provided for guiding the feed nut on said screw in an axial direction comprising first and second rail means, each having a planar surface engaging opposite faces of the feed nut.
  • One of the rails is secured to an inner surface of the body while the other rail means is mounted so as to be adjustable with respect to the first rail means so that the planar surfaces can be made and maintained parallel to each other.
  • the feed nut is maintained between two planar surfaces which prevent its radial movement about the power screw and which transfers any radial forces or torque directly to the surrounding housing rather than to the screw. Because of the adjustability of one of the rail members the parallel relationship between the planar surfaces can be maintained during the operation of the apparatus and not just provided initially during manufacture.
  • the adjustable rail is mounted on a pair of lugs integrally formed with the housing through which adjustment screws extend.
  • the surfaces of the feed nut adapted to engage with the planar surfaces of the guide rails is provided with low friction slide plates which allow the feed nut to readily slide with respect to the rails.
  • the slide plates are removably maintained on the feed nut so that they may be replaced when worn.
  • the lever mechanism connecting the feed nut with the valve spindle comprises a control lever which is connected to the feed nut by means of a pair of pull-rods which are spaced from each other an amount exceeding the width of the feed nut, so as to straddle the feed nut and the power screw. This provides a balanced mechanism on either side of the feed nut further reducing the possibility of the creation of undesirable radial forces.
  • FIG. 1 is a side view of the present apparatus showing the housing partially in section and the location of the power screw and guide means therein,
  • FIG. 2 is a sectional view of the apparatus shown in FIG. 1 taken along line 22.
  • the drive apparatus of the present invention comprises a hollow box like casing or body 10, of generally triangular shape, forming a housing for an elongated power screw 12 extending along its upper edge.
  • the power screw 12 is threaded along its length and is provided with a conformingly threaded feed nut 14.
  • Extending integrally from one of the power screw 12 is a shaft 16, journaled in both a radial bearing 18 and an axial bearing 20, set within an enlarged boss 22 in the input end of the body 110.
  • the bearings 18 and 20 are held by a cap 24 suitably fastened over the end of the boss 22 so that the power screw 12 extends cantilevered within the body 10.
  • the power screw 12 and the shaft 16 may be formed of separable members, screwed or otherwise fastened together to provide a continuous rotatable rod.
  • An enlarged flange 26 is provided at the input end of the power screw 12 to prevent the axial withdrawal of the feed nut 14.
  • the feed nut 14 has a generally rectangular outer configuration.
  • a shallow slot is formed on its upper and lower surfaces, in each of which removable plates 28 and 30 are respectively set.
  • the plates 28 and 30 are made of low friction material such as brass or a plastic, such as teflon so as to provide a very smooth and easily slidable surface.
  • the upper sliding plate 28 abuts against an elongated rail 32 secured to (or integrally cast with) the undersurface of the upper end of the body 10.
  • the engaging surface 34 of the rail 32 is formed to be smooth and flat so as to provide a first guide plane for the feed nut 14.
  • the rail 32 is uniform along its length and has a width as seen in FIG. 2 approximately equal to the corresponding dimension of the feed nut.
  • the slot in which the slide plate 28 is retained extends transverse to the rail 32 and opens to each side of the feed nut.
  • the lower slide plate 30 abuts against a rectangular, or prismatic rail 36 which has a flat upper surface adapted to lie in a plane 38 parallel to the plane 34 of the upper rail 32, thus forming a second guide plane for the feed nut 14.
  • the lower rail 36 is supported on a pair of spaced lugs 40 and 42, forming pedestals for the rail at each of its ends.
  • the lugs 40 and 42 are formed as a part of the interior of the body and extend in a generally perpendicular direction to the upper edge of the body. Extending through each of the lugs 40 and 42 is an adjustable leveling screw 41 and 43 respectively.
  • the leveling screws are adapted to be cooperatively adjusted so that the distance between the planes 34 and 38 may be equalized along their entire length thereby creating absolute parallel planar guide surfaces along which the feed nut 14 may slidably traverse.
  • Both the lower beam 36 and its supporting lugs 40 and 42 are substantially narrower than the width of the feed nut, as seen in FIG. 2, although of sufficient width to provide a planar engaging surface for the slide plate 30.
  • a pair of pivot pins 44 and 46 Extending from the lateral sides of the feed nut 14, in the general plane of the power screw 12, are a pair of pivot pins 44 and 46 to which one end of a pair of pull-rods 48 and 50 are freely journaled. As seen in FIG 2, the pull-rods straddle the feed nut 14, the power screw 12 and both the upper and lower rails 32 and 36.
  • the pull-rods are removably maintained upon the pins 44 and 46, by any suitable means, at a distance from each other slightly exceeding that of the width of the feed nut. This permits free movement between the pullrods and the feed nut. It also permits the pull-rods to maintain the slide plates 28 and in the slots formed on the opposing surfaces ofthe feed nut, which slots extend between the pull-rods.
  • each of the pull-rods 48 and 50 are connected to a control lever which is adapted to swing in an are carrying with it the rotary valve spindle.
  • the control lever comprises a pair of actuating arms 52 and 54 connected at their upper ends by a pivot pin 56 to each of the pull-rods 48 and 50.
  • the arms 54 and 56 are spaced from each other a distance sufficient to straddle the power screw 12.
  • the lower end of the arms 52 and 54 are integrally formed or fixedly connected to a cylindrical hub 58 extending transversely to the axis of the power screw 12 and which is freely journaled between the side walls of the body 10.
  • the ends of the hub 58 is necked down and is provided with suitable low friction seals 60 facilitating the journaling of the hub in the body 10.
  • the hub 58 is adapted to receive and be secured to a spindle (not shown) extending from the rotary valve (also not shown) which is to be controlled and operated by the drive apparatus.
  • the end of the hub is provided with a cap 62 on which a slot 64 or other marking may be engraved or otherwise provided to indicate the angular rotative position of the hub and consequently that of the valve spindle.
  • the feed nut 14 is located between two parallel guiding planes, one of which is adjustably mounted so that the parallelity of the planes may be initially established and maintained over the period of use of the device.
  • the guide planes are of substantial width, engaging the opposite surfaces of the feed nut so that the feed nut is stable between these two planar surfaces.
  • a further advantage is seen from the use of separable and easily removable slide plates which allow the use of low friction material which may be simply replaced after use. Still another advantage is obtained by employing a lever connecting mechanism having forked members, that is the parallel spaced pull-rods 48 and 50 as well as the parallel spaced arms 52 and 54, providing balanced parallel forces acting on the feed nut 14.
  • Drive apparatus for operating rotary valve spindles comprising a body, an elongated screw rotatably mounted in said body, a feed nut located on said screw, means for guiding said feed nut for movement on said screw in an axial direction and lever means adapted to connect said feed nut and the spindle of the rotary valve so as to convert said axial movement of said feed nut into rotary movement of said valve, comprising first and second rail means each having a planar surface adapted to engage opposite faces of the feed nut, and
  • adjustable rail means comprises a rectangular beam mounted upon a pair of lugs formed with said body and supported by adjustable screw means extending through said lugs.
  • said lever means comprises a control arm adapted to be connected to said valve spindle and a first pair of pull rods connected at one end to said control arm and at its other end to said feed nut, the width between said pull-rods exceeding the width of said feed nut.
  • control arm comprises a pair of arms straddling at one end said power screw and being attached at their opposite ends to a cylindrical hub adapted to receive the valve spindle.
  • adjustable stop means mounted within said body engaging said connecting arm to selectively limit the extent of movement thereof.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
US439704A 1973-02-12 1974-02-05 Drive apparatus for rotary spindles Expired - Lifetime US3874245A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS99573*#A CS157455B1 (enrdf_load_stackoverflow) 1973-02-12 1973-02-12

Publications (1)

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US3874245A true US3874245A (en) 1975-04-01

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ID=5343187

Family Applications (1)

Application Number Title Priority Date Filing Date
US439704A Expired - Lifetime US3874245A (en) 1973-02-12 1974-02-05 Drive apparatus for rotary spindles

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US (1) US3874245A (enrdf_load_stackoverflow)
CS (1) CS157455B1 (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136369A (en) * 1973-11-23 1979-01-23 Sycor, Inc. Disc recorder with lead screw drive
US4354396A (en) * 1980-05-22 1982-10-19 Dana Corporation Speed change mechanism with load bearing saddle
US4565104A (en) * 1982-09-20 1986-01-21 Scientific-Atlanta, Inc. Linear actuator for large-angle motions
US4693128A (en) * 1984-10-22 1987-09-15 T K Valve & Manufacturing, Inc. Apparatus for converting linear motion to rotary motion
US5966987A (en) * 1997-05-28 1999-10-19 Samsung Electronics Co., Ltd. Controlling device of tunable filter
EP1286085A1 (fr) * 2001-08-23 2003-02-26 Valeo Vision Dispositif de transformation d'un mouvement de translation en mouvement oscillant
US20040050192A1 (en) * 2000-10-26 2004-03-18 Sune Andreasson Self-centering device for linear drive units
US20080012395A1 (en) * 2005-01-14 2008-01-17 Eckhart Dewert Adjustable seating furniture
CN101220886B (zh) * 2006-12-18 2012-07-11 瓦尔玛蒂阀制造公司 具有剖分推力轴承的阀驱动器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874935A (en) * 1953-03-05 1959-02-24 Mitchell C Caster Automobile bumper jack
US3043160A (en) * 1959-08-28 1962-07-10 Pratt Co Henry Valve operator
US3103909A (en) * 1962-07-05 1963-09-17 Edgar F Anderson Front wheel turn indicator
US3220718A (en) * 1963-05-09 1965-11-30 Republic Industries Door operator
US3385120A (en) * 1966-07-06 1968-05-28 Rotork Eng Co Ltd Auxiliary drive unit for an actuator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874935A (en) * 1953-03-05 1959-02-24 Mitchell C Caster Automobile bumper jack
US3043160A (en) * 1959-08-28 1962-07-10 Pratt Co Henry Valve operator
US3103909A (en) * 1962-07-05 1963-09-17 Edgar F Anderson Front wheel turn indicator
US3220718A (en) * 1963-05-09 1965-11-30 Republic Industries Door operator
US3385120A (en) * 1966-07-06 1968-05-28 Rotork Eng Co Ltd Auxiliary drive unit for an actuator

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136369A (en) * 1973-11-23 1979-01-23 Sycor, Inc. Disc recorder with lead screw drive
US4354396A (en) * 1980-05-22 1982-10-19 Dana Corporation Speed change mechanism with load bearing saddle
US4565104A (en) * 1982-09-20 1986-01-21 Scientific-Atlanta, Inc. Linear actuator for large-angle motions
US4693128A (en) * 1984-10-22 1987-09-15 T K Valve & Manufacturing, Inc. Apparatus for converting linear motion to rotary motion
US5966987A (en) * 1997-05-28 1999-10-19 Samsung Electronics Co., Ltd. Controlling device of tunable filter
US7093510B2 (en) * 2000-10-26 2006-08-22 Tollo Linear Ab Self-centering device for linear drive units
US20040050192A1 (en) * 2000-10-26 2004-03-18 Sune Andreasson Self-centering device for linear drive units
US20030037628A1 (en) * 2001-08-23 2003-02-27 Remy Chave Device for converting straight-line motion to rotary motion
FR2828919A1 (fr) * 2001-08-23 2003-02-28 Valeo Vision Dispositif de transformation d'un mouvement de translation en mouvement de rotation
EP1286085A1 (fr) * 2001-08-23 2003-02-26 Valeo Vision Dispositif de transformation d'un mouvement de translation en mouvement oscillant
US20080012395A1 (en) * 2005-01-14 2008-01-17 Eckhart Dewert Adjustable seating furniture
US7861610B2 (en) * 2005-01-14 2011-01-04 Linrot Holding Ag Adjustable seating furniture
CN101220886B (zh) * 2006-12-18 2012-07-11 瓦尔玛蒂阀制造公司 具有剖分推力轴承的阀驱动器

Also Published As

Publication number Publication date
CS157455B1 (enrdf_load_stackoverflow) 1974-09-16

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